Note 10 - Fair Value Measurements (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended	3 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2012 Acquisition Contingent Consideration Payable [Member]	Sep. 30, 2012 Accrued Retention Plan Compensation [Member]	Sep. 30, 2012 10-Year Treasury Yield Curve Rate [Member]	Sep. 30, 2012 10-Year Credit Default Swap Rate [Member]	Sep. 30, 2012 3-Month Treasury Yield Curve Rate [Member]	Sep. 30, 2012 1-Year Credit Default Swap Rate [Member]	Sep. 30, 2012 1-Year Treasury Yield Curve Rate [Member]	Sep. 30, 2012 2-Year Credit Default Swap Rate [Member]	Sep. 30, 2012 Minimum [Member]	Sep. 30, 2012 Maximum [Member]	Sep. 30, 2012 Low [Member]	Sep. 30, 2012 Medium [Member]	Sep. 30, 2012 High - Lower Range [Member]	Sep. 30, 2012 High - Upper Range [Member]	Sep. 30, 2012 Weighted Average [Member]
Internal Eranings Projection Probability										10.00%	80.00%
Fair Value Inputs, Discount Rate	19.00%
Business Acquisition, Contingent Consideration, at Fair Value, Current (in Dollars)	$ 42.8
Business Acquisition, Contingent Consideration, at Fair Value, Noncurrent (in Dollars)	73.6
Fair Value, Option, Changes in Fair Value, Gain (Loss) (in Dollars)		$ 16.4	$ 14.6
Fair Value Inputs, Entity Credit Risk												7.50%	8.00%	9.50%	11.00%
Jackpot Liabilities Expected Payment Term										1 year	25 years					10 years
Fair Value Assumptions, Risk Free Interest Rate				1.64%	1.74%	0.09%	0.42%	0.16%	0.72%